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sketchMedia · 05-12-2008, 12:00 AM

A nested loops is a loop that has a loop within it. First of all the outer loop's first iteration triggers the inner loop then the inner loop continues until completion, then the outer loop cycles again thus causing the inner again to trigger again.

put into a simple example:

PHP Code:


			
for($i=0;$i < 10; $i++)
{
    echo 'Line ', $i + 1, ' ';
    for($j=0; $j < 5; $j++)
    {
        echo $j;
    }
    echo '<br />';
}

outputs :

Code:

Line 1 01234
Line 2 01234
Line 3 01234
Line 4 01234
Line 5  01234
Line 6 01234
Line 7 01234
Line 8 01234
Line 9 01234
Line 10  01234

basically the first loop out puts : 'Line 1' then the nested loop starts and echos numbers 0-4, then the first loop echos 'Line 2' then triggers the nested loop again and the cycle continues until the first loop finishes.

hope i made that helps

05-12-2008, 12:00 AM	#4 (permalink)
sketchMedia The Frequenter Join Date: Oct 2007 Location: Manchester, UK Posts: 422 Thanks: 22	A nested loops is a loop that has a loop within it. First of all the outer loop's first iteration triggers the inner loop then the inner loop continues until completion, then the outer loop cycles again thus causing the inner again to trigger again. put into a simple example: PHP Code: `for($i=0;$i < 10; $i++) { echo 'Line ', $i + 1, ' '; for($j=0; $j < 5; $j++) { echo $j; } echo '<br />'; }` outputs : Code: Line 1 01234 Line 2 01234 Line 3 01234 Line 4 01234 Line 5 01234 Line 6 01234 Line 7 01234 Line 8 01234 Line 9 01234 Line 10 01234 basically the first loop out puts : 'Line 1' then the nested loop starts and echos numbers 0-4, then the first loop echos 'Line 2' then triggers the nested loop again and the cycle continues until the first loop finishes. hope i made that helps __________________